Skewback for hollow-tile arches.



H., L- HINTON'.

SKEWBAUK FOB HOLLOW TILE ARGHES.

APPLICATION FILED NOV. 11, 1907.

Patented Oct. 4, 1910.

HENRY L. HINTON, OF NEW YORK, N. Y.

SKEWBACK FOR HOLLOW-TILE AROI-IES.

Specification of Letters Patent.

Application filed November 11, 1907.

Patented Got. t, 1910.

Serial No. 401,679.

To all whom it may concern:

Be it known that I, HENRY L. HIN'roN, a citizen of the United States, residing in the city of New York, in the county and State of New York, have invented certain new and useful Improvements in Skewbacks for Hollow-Tile Arches, of which the following is a specification.

Such skewbacks as heretofore made have been provided with a slot for the reception of the lower flange or foot of the I beam upon which the arch abuts, fitted thereto with such approximate closeness that the position of the skewback on the I beam has been practically fixed, and therefore different patterns of skewbacks have been required for arches of different inclinations.

The object of my improvements is, to effect economy and convenience in this respect, by providing a skewback a single pattern of which may be used in constructing arches of dilferent inclinations. This I accomplish by cutting off the long upper portion of the skew'back (as heretofore constructed), and so shaping the lower part which receives the main thrust of the arch that it may be shifted or oscillated upon the lower flange or foot of the I beam so as to present a differently inclined face for the reception of the abutting tiles or blocks of arches of different inclinations.

By the term skewback as hereafter used herein, I refer to the comparatively short lower portion thereof, the separated upper portion retaining the same shape as heretofore, and being set upon the lower portion or skewback proper, when the latter is in place, to complete the abutment of the arch.

The invention will be best understood by reference to the accompanying .drawings,

Figure 1 of which shows an end view of a skewback made in accordance with my invention in place on an I beam, and in position to receive the end block of an arch of relatively slight pitch; Fig. 2 shows an end view of the skewback rotated so as to be in position to receive the end block of an arch having a sharp pitch, and Fig. 3 shows an end view of the skewback rotated in the opposite direction, so as to be in position to receive the end block of a flat arch.

The same letters of reference indicate corresponding parts in the several figures.

I, is an I beam adapted to form the support of an arch; A the skewback prop-er, and

B the separated upper extension thereof. The skew'back A is provided with a slot, .9, for the reception of the lower flange or foot, 2', of the I beam. The rear of the slot, 8, is provided with a depression or downwardly extending recess, a, which extends below the plane of the floor of the front portion of the slot to a sufficient depth to give room for the movement of the skewback about the end of the foot of the I beam.

The face, a, of the skewback, A, which lies nearest the web of the I beam when the skewback is in position, is so shaped as to form with the upper surface, I), of the slot, 8, an angle smaller than that formed by the web of the I beam with the upper surface of the lower flange or foot thereof, so that when the surface, 6, rests in its entirety upon, or (by reason of interposed cement) parallel with, the upper surface of the foot of the I beam, as shown in Fig. 1, the face 0, will slope upwardly away from the web of the I beam. The exact slope to be given the face 0, will depend upon the range of pitch of arch it is desired to provide for, the smaller the angle formed by the surfaces 1) and c, the greater the range of pitch, and vice versa but in no case should such angle be greater than 90, as shown in the drawings. The recess (Z, in the upper part of the skewback is intended for the reception of cement, whereby the upper portion, B, is attached to the skewback, and the skewback itself more firmly anchored in place.

In putting the skewback in position, a suitable quantity of cement is spread on top of the lower flange or foot of the I beam, and the skewback is put in place in the position determined by the inclination of the arch to be built, the cement being squeezed by the pressure of the skewback into the open spaces above and below the foot of the I beam. The recess, (Z, is then filled with ce ment, the extension piece, B, put in place, and the arch is completed in the usual manner.

By means of my invention a single pattern of skewback may be used, in arches of any inclination, an advantage which will be readily understood by those skilled in the art.

What I claim as new and desire to secure by Letters Patent is:

1. A skewback for hollow tile arches having a slot for the reception of the foot of an I beam, a depression in the rear of said slot extending below the plane of the floor of the front portion of the slot, and a face portion set at such an angle to the upper surface of said slot that when such surface lies parallel with the upper surface of the foot of the I beam, such face portion slopes upwardly away from the web of the I beani, substantially as and for the purposes set forth.

2. A skewback for hollow tile arches having a slot for the reception of the foot of an I beam, which slot is provided with a recess at the rear thereof extending below the plane of the floor of the front portion of the slot, substantially as and for the purposes set forth.

A skewback for hollow tile arches provided with a lower plane face and side faces one of which is provided with a slot for the insertion of the flange of an I beam, the plane of the upper surface of which slot forms an acute angle with said lower plane face, and so shaped that the plane of the upper portion of said slotted face forms an angle of not more than 90 with the plane of the upper surface of the slot therein, substantially as set forth.

In testimony whereof, I have hereunto subscribed my name, this 8th day of November, A. D., 1907.

HENRY L. HINTON.

Witnesses WILLIAM J. KINDGEN, GLARKSON A. CoLLiNs. 

